according to statistics provided by california d.o.j. about 75% of the prohibited persons they're looking for are those with mental health disorders. >> you could find something that's stable, very unstable, medicaided, so the agents are on high alert when they go up to these doors. because they don't know the stability of the person at the door. >> reporter: many police departments don't have the time or money to go after those weapons that leave it is california d.o.j. bureau of firearms. 40 agents that's it across the state. >> every day the system is populated by new people. so it's populating faster than we can bring the number down. >> reporter: they're on their own every week, one city at a time. one door at a time. looking to keep you and others safe. >> mike mibach, ktvu channel 2 news. >>> a homeless woman who was killed in a bizarre samurai sword attack has been identified. state officials say the victim was 70-year-old joan hughes who was originally from new york. members of the community held a vigil for her after her death.